Concrete-wall construction



2 Sheets-Sheet l Apr.'24, 1923. v A. H. NELSON CONCRETE WALL CONSTRUCTION Fiied sept. 17.

Apr. 24, 1923.` 1,452,751 A. H. NELSON CONCRETE' WALL coNsTRucTrQN Filed sept. 17. 1921 2 Sheets-sheet 2.

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Illillllll Patented Apr, 24, i923,

marini orties;

y AXEL HERIVIAN'k NELSON, OF TURLOCK, CALIFORNIA.

CONCRETE-WALL CONSTRUCJJION'.

Application filedy September 17, 192,1. Serial No. 501,378.

, To all whom t may concern.'

Be it known that I, AXEL HERMAN soN, a citizen oi' the United States, and resi? dent of Turlock, county of Stanislaus, and State of California, have invented a new and useful Concrete-Wall Construction, of'which the following is a specification.

Thek present invention relates to improvements in concrete wall construction and its principal object is to provide a convenient means for constructing a hollow concrete wall. A further object of the Vinvention is to provide a form by means of which the' wall may be constructed stepwise. A :turther object is to provide means whereby during the stepwise construction of the wall reiniorcing members holding the walls in spacedv relation may be introduced without in anymanner interfering with the proper operation of the forms.

The preferred form of my invention is illustrated in the accompanying drawing, but I wish to have it understoodthat changes and modifications may be made as to the details of construction without aii'ecting the spirit of the invention. In the drawings Figure 1 'is a top plan view of a portion of my form as it appears when in operation; `Figure 2 is a horizontal cross section along line 2-2 of Figure l3; Figure 3 is a vertical cross section along line, 3-3 of Figure 1; Figure L illustrates an end view and the interior portion of my form; Figure 5 is a side view of the wall with a portion of the concrete shown broken away; Figure' 6 is an enlarged' detail view showing the disposal of the reinforcing members connecting the two walls, and Figure 7 is an end view of the wall as it appears wheniinished. Referring to the drawings in detail, it will be seen thatmy form consists of two exterior members (1) and two interior members (2). It may be mentioned that in ordinary practice I would use for the exterior' members planks about 11% thick and 12 wide, while for the interior members I would use planks somewhat thinner but about 2 wider so that the interior members would project downwardly over the exterior members by a few inches. The exterior members are spaced apart the full width of the contemplated walland are held in spacedv relation to each other by means of cross bars (3) engaging thepuprights` (4), secured to theplanks in any desired manner andy projectingabove theplanks` as shown in'Fig#V ure The cross bars are secured between these uprights by means of screws (6)v adapted to be received on the threaded ends of the cross bar. vThe fit betweenthe screws and the uprights is made suiiiciently loose so as to allow a certain amount of play. These uprights are ffurther provided with hooks one being secured in each upright a small distance above .the plank (1), and the two hooks being adapted to receive the eyes (8) at the outer ends of levers (9) the inner ends of said levers being pivotally secured on the body portion (11) of a pan-shaped member (12), the handle (14) of which ex-y tends parallelto the kmembers (1).v The two levers co-operate with the pan shaped member ins'uch a manner that upon turning the' handle to the left as indicated in vdotted lines in Figure 2 the levers ypress the exterior members (1) apart, while jon the rel turn of the handle to its longitudinal posiltionthe exterior members (1) are drawn together; The interiorl members Anormally depend from thebar (3) andare se-y cured to the same, as shown in Figure, by means rof'rods (16) pivotally secured to the cross bar as shownpat (17), and piv-r` otally secured to the'tops of the interior y i members (2), as shown at (18). These two interior members are held in spaced relation to each other by means of flattened rods (21) which extend downwardly from the member (12) in sucha manner 'that the flat portion of the same runs transversely to the handle (14:). It will thus be seen that when the handle'(1l) is in the longitudinal position indicated in fulllines in Figure'2, the rod (21) forces its widest extension between the interior members so as to spread thesame apart, while on turning the handle (14) into the dotted line position in Figure 2 the rod will b'eturned aroun'dso as to present its iiattened portion between the two interior members (2), and to allow the two latter' members'to collapse toward each other.

The two'interior members are provided in their lower portions with registeringslots (28) which are adapted to receive reinforcing members (24) designed to `bind the two walls together, "as shown particularly wellfin` Figure -6 In actual operation my device isl used as I follows: Assuming for the sake of simplicity that it is desired' to put up alsingle wall several times the length of ak unit of form, f

4which latter isnecessarily held within coni y members.

venient limits, say about 12 feet. I rst erect a number of uprights, only one pair of which is shown at spaced in such a manner that the wall may bevreceived between the same and provided with suitable vstrips adapted to receive correspondingl recesses (30) in the ends of the outer planks (l), which prevent the latter from collapsing inwardly. My p exterior members (l.) are placed between the uprights in such a manner that the inner sides of the members (l) are iush with the inside of the uprights. l'lheentirertorm is supported by means of blocks and tackle not shown in the drawing and suspended from upper horizontal frame In their natural position the exterior frame -members (l) will loosely depend from the bar (3) and the interior members y(2) will in thesame manner be suspended from the pivot (17) of the bar (3). The fiat rod (2l) or a plurality of the same are then introduced between the two interior members Aand the links (9) are connected to the hooks pressed into the longitudinal direction shown in full lines in Figure 2. This has a double eii'ect. In the lirst place the interior members (2) are forced apart and secondly the exterior members (l) are kdrawn together.

In this position all the form members oc-` cupy a vertical position and the concrete y may now be illed into the spaces (26) and (27), each of which is enclosed by one ex terior and oneinterior member, while the space between the interior members is left unoccupied. In this condition the concrete lco is allowed to set.

After the cement is hardened sufficiently to stand without support, the handles (14) are turned into the position indicated by the dotted lines in Figure 2, whereby theexte- .rior members are-forced apart, while the interior members are allowed to collapse due to the fact that the flattened rod is turned. A hoist` may now be employed to lift the form suiiiciently high to clear the lower extremities of the exterior members (l) Afrom spaces (26) and (27) are iilled with cement,y 1 again and this operation is repeated until a wall of the desired height is constructed.

g Q While in my udescription I have referred The handle (14) is then to a single unit being operated in the construction of a comparatively short wall, it is evident that a plurality oi5 units may cooperate? in the construction of an entire building and that the Voperations may be timed in such a manner that the crew can begin at one end of' the building and work around the whole building to find the concrete at the place o' beginning sufficiently set to start with the next layer.

I claim:

i.' ii form for constructing a hollow concrete wall, comprising a set of exterior planks having uprights extending therefrom, a rod for joining corresponding up'- rights at the ytop inrspaced relation, a set of interiorv planks loosely supported between the exterior planks, and a lever having two links associated therewith engaging corresponding uprights at a lower point for forcing the same apart or together, and means associated with the lever for simultaneously actuating the interior planks in an opposite sense.

2, A form for constructinga hollow concrete wall, comprising a set oit exterior planks having uprights extending therefrom,` a' rod for joining corresponding uprights at the top in spaced relation, a set of interior planks loosely supported between the exterior planks, and a leverhaving two links associated therewith engaging corresponding uprights ata lower pointfor :torcing the saine apartvor together, and a` cani member extending downwardly from the lever for actuating the interior planks in an opposite sense.

3. In a device of the character described, means for spacing two forni members 'comforni members 4in corresponding places and extending inwardly, a lever disposed with its fulcruin between the two points of engagement and means for engaging the inner ends of the links with the leverat points dia'i'i'ietrirally opposite one another relative to the fulcrumq (p 4. Iny a vdevice of the character described, means for spacing two forni members conipris'ing two links pivotally eno"` ging the prisingtwo curved links pivotally engaging 'the form members 1n corresponding places` and extending inwardly,` a -leverl disposed with its iulcrum between the two points'oi engagement, and means for engaging the inner vends or' rthe links with the leverso that the links passing around the fulcrum are locked on the centerline when the leveris in its form holdingposition.

5. In a device of the character described, means for simultaneously spacing an inner set andan outer set oif'form members, comprising twoy links pivotally vengaging the outer form members in corresponding places and extending inwardly, a' lever 'disposed with its fulcrum between the two points of 'ends of the links with the lever at points diametrically opposite Aone another relative `to the fulorum, and a cam member extendingl downwardly from the' lever between the inner form members for spacing the same in a direction opposite to that of the outer members. v

6. In a .device of the character described, means for simultaneously spacing an inner set and an outer set of form members, comprising two curvedlinks pivotally enga ing the outer form members in correspon ing lplaces and extending inwardly, a lever kdisposed with its" fulcrum between the two points `of engagement, means. forfengaging the inner ends of the links with the lever so that the links passing around the fulerum are locked on the centerline whenthe lever is in its form holding position, anda cam member extending downwardly from the leverbetween the inner ornu'members for spacing thersame in a direction opposite to that of the outer members.

AXEL yKHERMJMV NELSON. 

